Remove filterLocation property from the evaluator

[Nusiq]

The Go-Simple-Eval evaluator gets a property called filterLocation. It's not documented and it doesn't seem to make much sense in the context in which we use the evaluator especially with that name.

Same with settings it doesn't seem to work properly.

regolith/regolith/evaluator.go

Lines 56 to 57 in abd33df

	"filterLocation": ctx.AbsoluteLocation,
	"settings": ctx.Settings,